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// Copyright (c) 2018, Compiler Explorer Authors
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
import {LRUCache} from 'lru-cache';
import type {GetResult} from '../../types/cache.interfaces.js';
import {BaseCache} from './base.js';
export class InMemoryCache extends BaseCache {
readonly cacheMb: number;
private readonly cache: LRUCache<string, Buffer>;
constructor(cacheName: string, cacheMb: number) {
super(cacheName, `InMemoryCache(${cacheMb}Mb)`, 'memory');
this.cacheMb = cacheMb;
this.cache = new LRUCache({
maxSize: cacheMb * 1024 * 1024,
sizeCalculation: n => n.length,
});
}
override statString(): string {
return `${super.statString()}, LRU has ${this.cache.size} item(s) totalling ${this.cache.calculatedSize} bytes`;
}
override async getInternal(key: string): Promise<GetResult> {
const cached = this.cache.get(key);
return {hit: !!cached, data: cached};
}
override async putInternal(key: string, value: Buffer): Promise<void> {
this.cache.set(key, value);
}
}
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